blob: d59d0bc8e2f7eec6b6675774cdfc945759019ede (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/*******************************************************************************
* Copyright (c) 2011 protos software gmbh (http://www.protos.de).
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* CONTRIBUTORS:
* Henrik Rentz-Reichert (initial contribution)
*
*******************************************************************************/
package org.eclipse.etrice.dctools.fsm.ast
import org.eclipse.etrice.dctools.fsm.ast.util.IDCAstNodeVisitor
import org.eclipse.etrice.dctools.fsm.ast.nodes.DCAstNode
import org.eclipse.etrice.dctools.fsm.ast.nodes.DCAstMatchNode
import org.eclipse.etrice.dctools.fsm.ast.nodes.DCAstTextNode
import org.eclipse.etrice.dctools.fsm.ast.nodes.DCAstBracketNode
class DCNodeAtOffset implements IDCAstNodeVisitor {
int offset
DCAstTextNode result = null
private new (int offset) {
this.offset = offset
}
static def find(DCAstMatchNode ast, int offset) {
val visitor = new DCNodeAtOffset(offset)
ast.visit(visitor)
return visitor.result
}
override visitBegin(DCAstNode node) {
if (result===null) {
if (node instanceof DCAstTextNode) {
if (node.begin<=offset && offset<node.end) {
result = node
}
}
if (node instanceof DCAstBracketNode) {
// also test the closing bracket
if (node.posClose>=0) {
if (node.posClose==offset) {
result = node
}
}
}
}
return result===null
}
override visitEnd(DCAstNode node) {
}
}
|
